Stump-pulling and stone-lifting device.



O. P. NELSON.

STUMP PULLING AND STONE LIFTING DEVICE.

APPLICATION FILED MAY 1, 1908.

910,567. Patented Jan.26,1909.

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srnrns OL OF F. NELSON, OF SOUTH SUDBURY, MASSACHUSETTS.

STUMP-FULLTNG AND STONE-LIFTING DEVICE.

Application filed May 1, 1908.

To all whom it may concern:

Be it known that I, Gror F. NnLsoN of South Sudbury, county oflviiddlesex, State of Massachusetts, have invented an Improvement inStump-Pulling and Stone- Liiting Devices, of which the following is aspecification.

This invention relates to stump-pulling and stone-lifting devices, andhas for its object to improve the construction of the same in severalparticulars, aiming particu larly to augment the strength of the partsand to provide very substantial bearings therefor, in order that a heavyveight may belitted.

Figure 1 is a side elevation of a stumnpulling and stone lifting deviceembodying this invention, the usual tripod and grap pling chains beingomitted. Fig. 2 is an enlarged detail, showing in front elevation thelocking-pawl and in section the liftinglever. Fig. 3 is a verticalsection of the locking-pawl shown in Fig. 2, taken on the dotted line3-3. Fig. 4 is an enlarged detail of the end portion of thelifting-lever. Fig. 5 is a sectional detail of the ratchet toothed bar.and locking-pawl in engagement therewith.

The supporting-frame for the operating parts is adapted to be suspendedfrom a tripod or other suitable structure. This frame comprises anelongated body a forming the lower part thereof, and an elongated loop aconnected to the upper end of said body and The body has a vertical slota in line with and also in open communication with the opening betweenthe arms of the loop, so that the frame has an elongated openingextending from top to bottom or thereabouts.

The slot is made Wide enough to receive a ratchet-toothed bar 6, to thelower end of which the grappling chains are adapted to be connected.This bar is designed to be moved up and down in the frame. The slot aterminates near the lower end of the body a, and said body has avertical hole through it, at its lower end, in continuation of saidslot, through which the bar 6 extends. The two upright side portions ofthe body a are joined together near their upper ends by side connections(1 extending across the slot a and arranged to provide between them anopening for the bar 3), and said connections are preferably formedintegral with the body a. The frame thus constructr l I l E 1 l iSpecification of Letters ?atent.

Fatented Jan. 26, 1909.

Serial No. 439,289.

ed is very substantial and is adapted to withstand a severe strain.

0 represents the lifting-lever which is formed with a yoke at the endwhich straddles the frame. It is pivotally connected to the body a by apivot-pin 0 extending through the arms of the yoke and through the body.The extremities of the arms of the yoke are arranged to form bearingsfor the lower end of a lifting-pawl (Z. The upper side 01" one of saidarms, as 0 has a curved bearing portion for the lower end of said pawl,and the upper side of the other arm, as 0 has a similar curved bearingportion for the lower end of said pawl, and also has an ear 0 at theouter side of said bearing portion which is soclreted to receive atrunnion d projecting from one side of the pawl, see Fig. 2. By means ofthe trunnion the pawl is connected with the lifting-lever in such mannerthat it may be moved up and down by it, yet it may be easily removed ordisengaged therefrom whenever desired.

he lifting-pawl (Z consists of ablock adapted to be supported in uprightposition having its lower end formed with curved bearing portions toengage the curved bearing portions on the lifting-lever. It is groovedat one side from top to bottom to receive the ratchet toothed bar, andhas a detent d at the bottom of the groove to engage the teeth of thebar. The curved bearing portions are formed on the lower ends of the twoside portions of the block and also on the lower end of the end wall,the bearing portion on the latter being in continuation of the bearingportions on the former. As the side portions extend over the oppositesides of the bar they assist in guiding said bar. One of its sideportions has attached to it a spiral spring d which is attached to theextremity of the arm 0 of the lifting-lever, or to some other part, theaction of which is to hold the pawl in engagement with the bar. Itsopposite side portion has attached to it a handle (Z adapted to beengaged by the operator for the purpose of moving the pawl out ofengagement with the bar. By attaching the spring (1 to the lifting-leverit will be bodily lifted with the pawl as the lever is depressed and atthe same time will be shortened, and will be extended as the lever israised thereby avoiding the necessity of lifting the pawl against theaction of said spring.

The body of the frame is recessed at a point above and adjacent thepivot of the lifting-lever, as at a", to receive the liftingpawl and topermit movement thereof in a direction away from the ratchet toothed baras it passes over the ratchet teeth on its return movement, and the topwall of said recess is so disposed as to be engaged by the pawl to limitits upward movement.

0 represents the locking-pawl which consists of a block adapted to beheld in upright position. It has a vertical groove in one side of it toreceive the ratchet toothed bar and a detent e at the bottom of saidgroove or upon the inside of its end wall. Its side portions extend overthe opposite sides of the bar and assist in guiding said bar. To one ofits side portions a spiral spring 6 is attached which is attached to theframe to thereby hold it with its detent in engagement with the bar, yetsaid spring is free to yield to permit the bar to be raised by theaction of the lifting lever and the detent to slip over the teeth of thebar. The body a of the frame has a recess a, to receive said pawl andthe top wall of said recess is so disposed as to limit upward movementthereof so that it is correctly held in place. The lower ends of theside portions are formed with curved bearing portions, and so also 1Sthe lower end of its end wall, the bearing portion on the latter beingin continuation of the bearing portions on the former. The body a of theframe is provided at each side of the opening for the bar with curvedbearing portions to receive the bearing portions of the pawl. When thebar is removed from the frame the pawl may be easily removed as it isnot connected with the frame, except by the spring, yet the bearingportions provided for it are very substantial.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is 1. In a stump-pulling and stone-liftingdevice, a frame, a ratchet-toothed bar, a liftingpawl consisting of ablock grooved from top to bottom, having a detent at the bottom of saidgroove and having the lower ends of its side portions and also the lowerend of its end wall formed with curved bearing portions, and alifting-lever having a yoke pivotally connected with the frame, the armsof which are formed with curved bearing portions to receive the bearingportions of said pawl, substantially as described.

2. In a stump-pulling and stone-lifting device, a frame, aratchet-toothed bar, a block grooved from top to bottom to receive saidbar and having a detent to engage the teeth of said bar, and havingcurved bearing portions at its lower end, and also having an ear, alifting-lever pivoted to the frame having bearings which support saidblock, and having a forward extension beyond said bearings, and a springattached at one end to the ear on said block and at the other end to theextension on said lever, which is arranged to hold said block with itsdetent in engagement with the bar, substantially as described.

3. In a stump-pulling and stone-lifting device, a slotted frame havingcurved bearing portions at opposite sides of the slot for a lockingpawl, a locking-pawl having curved bearing portions at its lower endengaging the bearing portions on the frame and having a vertical grooveat one side from top to bottom, a ratchet-toothed bar engaged by saidpawl, a spring connected with said pawl for holding it in engagementwith said bar, and means for lifting the bar, substantially asdescribed.

4. In a stump-pulling and stone-lifting device, a slotted frame havingcurved bearing portions at opposite sides of the slot and having arecess adjacent said bearing portions and a locking-pawl contained insaid recess, upward movement of which is limited by the top wallthereof, having curved bearing portions at its lower end engaging thecurved bearing portions on the frame, a ratchet-toothed bar, a springfor holding said pawl in engagement with said bar and means for liftingsaid bar, substantially as described.

5. In a stump-pulling and stone-lifting device, a slotted frame havingcurved bearing portions at opposite sides of the slot, a locking-pawlhaving a vertical groove at one side from top to bottom and havingcurved bearing portions formed at the lower ends of its side portionsand also at the lower end of its end wall in continuation of theaforesaid bearing-portions, a ratchet-toothed bar engage-d by said pawl,a spring connected with said pawl for holding it in engagement with lsaid bar, and means for lifting the bar, substantially as described.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

OLOF F. NELSON.

Witnesses:

B. J. NOYES, H. B. DAVIS.

